We are using the Dbvisit Standby Archive Management Module. If I want to change the threshold percentage from 5% to some other value, can I directly edit the Dbvisit Standby database configuration (DDC) file? Is there something else that needs to be done?

Yes, the Dbvisit Standby database configuration (DDC) file can be directly edited (on the primary server ONLY), making it really easy to change the configuration. Nothing else needs to be done. The configuration file(s) will be automatically copied to the standby server(s). Any of the variables in the configuration file(s) can be changed at any time.